Trolley harp



Sept. .1, 1931; r. c. csEo TROLLEY HARP Filed Jan. 21, 195o Patented Sept. 1, 1931 f im;

` UNITED STATES PATENT. OFFICE FREDERICK C. COSEO, OIF COLUMBUS, OHIO, ASSIGNOR T V.]'ILFE]R.1E1Y 'MANUFACTUR- ING COMPANY, OF COLUMBUS, OHIO,3A CORPORATION OF OHIO TROLLEY f HARP l Application led .Tanuary'21,u1930. Serial No. 422,399.

The invention relates to trolley or overhead devices used on electric locomotives, cars, and the like, where a trolley wire or rod is used.

It has been found that where relatively high currents are employed to drive large motors,`sliding contact shoes are more efficient and desirable than the ordinary trolley wheel. v

The usual standard trolley harp vandV pole has proven unsatisfactory; due mostly to the tendency vof the'trolley shoe to break contact with the conducting wire or rod. This is especially true when the trolley shoe -r passes over connections and switches and around curves in the conducting wire ror rod. kWhen such contactis broken, thereresults an arcing, and intermittent surges of power, as theshoe bumps along the con- 1 ducting wire or rod, thereby causing unusual strain upon and likelihood of injury to the electric motors.

It is one of the objects of my invention to prevent or minimize the accidental breaking `of Contact between the trolley shoe and trolley wire, thereby eliminating` the attendant disadvantages. Y

Another object of my invention is to provide a trolley shoe which is'capable of satisfactorily transmitting high voltage currents to the locomotive motors.

i Still another object of -my invention is to provide a trolley shoe which is simplezin construction and cheap to manufacture.

With these and other objects and advantages in mind, attention is called to the drawings, in which: f y 1 Figure 1 is a plan view of the assembled trolleyl harp and shoe.

Figure 2-is an elevation of the assembled trolleyharp and shoe, and A j Figure 3 is a section along the line 3-3 of Figure 1. .j Referring speciicallyto the drawings, in

' which like numbers indicate like parts, there is provided the trolley pole 4 of usual design having a spring at its base, (not shown) in order that there will alwayse be an upwardk pressure exerted thereon to force thetrolley shoe against the trolley wire or lrod` A easting 5 is secured to the upper/end of the trollley pole in any suitable manner, and is provided-'with a bearing member 6. A trolley harp 8 is rotatably mounted upon the bearing/member, and is held thereon by the'bolt 7, provided with a nut at its lower end. The trolley harp comprises brackets 9 provided with' bosses 10, each of which has an aperture therein,around which are cast semi-circular projections 13; apertures is a sleeve l1, adapted at each end to receive cotter pins 12, which are held from turningA bythe projections 13, thereby preventing rotation of the sleeve 11.r

rA trolleyv shoe 14 is ymounted for limited movement on the sleeve 1l, and comprises a substantially longitudinally flat surface 15 providedwith flanges 17 on both sides to minimize any possible displacement of the shoe "from "the trolley jwire 16. o A iexible connectionl9 is secured at one end to a lug 18 on the shoe 14, and at the other end to thev castingby means of a clamping plate 20and screw 21. Through this iexible wire 19, the relectric current is transmitted from the trolley shoe to the power units through 'j wires (not-shown) from the castingv 5. y

A second or follower shoe 22 is provided with arms 28 having bosses 24, which are rotatably mountedy on the sleeve 11. At' the lower lfronrtfend vof the'trolley harp 8 is 'a lateral extension' 25, through which extends a'slotted pin 26.' A spring 27 has one end '28"inserte`d inthe slotted pin 26, and the other endexerts pressure against an insulating` block 29,v attached to the underside of arm 23; the spring 27 being wound around thepinjk26 to tension it. Itwill be noted that the hexagonal head of the pin 26 is held' against rotation by means ofthe hexagonal recess on the arm wherein said pin isinserted. A flexible current conducting wireBO'connects the shoe 22 with the depending lug 18.

From the above description and the illus'- trati'veldisclosureyit will be seen that a contaetjshroeis provided; for transmitting high tension currents,`and'if,` due to any irregularities in the trolleywire, such as Switches, cross-overs,'curves or the like, the main shoe Extending through the from the trolley wire, for the follower shoe will maintain its contact withthe wire. By providing the roatable harp and mounting the main shoe and the follower shoe in the manner disclosed, the device adapts itself tothe various structural irregularities found in the trolley wire or rod. rllhe shoes not only swing upon the harp, but also have movements independent of the harp and of each other relative to the wire or rod so that likelihood of complete disengagement and cutting off of current is practically eliminated.

It is understood that the invention is subject to various forms and modifications without departing from the scope of the appended claims. Y f

I claim:

.1. In a trolley, a rotatable harp, supporting means therefor, a trolley shoe mounted for oscillation therein, and a second trolley shoe connected therewith.

2. In a trolley, a rotatable harp, supporting means therefor, a trolley shoe mounted for oscillation therein, a second trolley shoe connected therewith :and means to exert pressure against said second trolley shoe.

S. In a trolley, a rotatable harp, supporting means therefor, a trolley shoe mounted for oscillation therein, an arm extending from said harp, a second trolley shoe mounted on said arm, and means to exert pressure against said second trolley shoe.

4. In a. trolley, a rotatable harp, supporting means therefor, a trolley shoe mounted for oscillation therein, an arm .extending from and .movably connected tosaid harp, a second trolleyshoe mountedfon Ysaid arm, and means to exert pressure against said second trolley shoe.

5. In a trolley, a rotatable har.p,.support Aing means therefor, atrolley shoe comprising a flat surface with flanges on two sides mounted therein, an arm extending from and movably connected to said harp, asecond trolley shoe mounted on said arm and means to exert pressure against said ysecond trolley shoe.

6. In a trolley, a rotatable harp, supporting means therefor, a trolley shoe comprising a flat surface with flanges on two sides mounted for limited movement therein, an arm extending from and movably connected to sait?` harp, asecond trolley shoe mounted on said arm, and means to exert pressure against said second trolley shoe.

7. 'In a trolley, a -rotatable harp,- supporting means therefor, a trolley shoe movable therein, an arm extending from and movably connected to said harp, a Vsecond-trolleyv shoe lmounted on said arm, a second arm extending from said harp, and means between said arms to exert pressure against said second trolley shoe.

8. In a trolley, al rotatable harp, supporting means therefor, a trolley shoe movable therein, an arm extending from and movably connected to said harp, a second trolley shoe mounted on said arm, a second arm extending from said harp below said first named arm,'a'nd.a spring secured to said second arm and eXertingpresSure against said iirst named arm.

`9. In a trolley, a supporting member, a split bracket having apertures near its ends rotatably mounted thereon, a sleeve extending through said apertures, a trolley shoe mounted 'on said sleeve, an arm movably mounted on said sleeve, a second trolley shoe mounted on said arm, a second arm extending from and forming part of said bracket, and means between said arms to exert pressure against said second trolley shoe.

l0. In a trolley, a supporting member, a split bracket having apertures near its .ends rotatably mounted thereon, a sleeve extending through said apertures, a trolley shoe mounted on said Y sleeve, an arm movably mounted on said sleeve, a second trolley shoe mounted on said arm, a second arm extending from and forming part of said bracket, and a spring secured to said second arm and exerting pressure against said first named arm. Y y

11. In a trolley, a harp mounted for rotation about a substantially vertical pivot, a main contact .shoe pivotally mounted in said harp', a carrier arm pivotally mounted on said harp for independent movement, and a second contact shoe carried by said arm.

12. In a trolley, the combination of a pivotally Ymounted harp, `a main Contact shoe mounted for limited pivotal movement .in said harp, `an arm pivotally `mounted on said .harp with its axis coincident with that of said `main shoe, a second contact shoe car- -ried by said arm, and-meanscarried by said harp tending to maintain said second shoe altfays in contact with `the trolley wire or ro 13. In a trolley, a pivotally mounted harp, a main contact shoe pivotally mounted in said harp for limited .pivotal movement, a carrier .arm having supporting members mounted on the same pivot as said .main shoe -but movable independently thereof, a second shoe mounted on said arm, and resilient means carried by said harp and engaging said arm to maintain said second shoe always in Contact with the trolley wire or rod.

'14. In a trolley, a harp, supporting means therefor, a `trolley shoe mounted for oscillation therein, and a second trolley shoe connected therewith.

therewith.

In testimony whereof I have hereunto set my hand.

FREDERICK C. COSEO. 

